CN1279144C - Method of producing mixed coal gas by using residual heat of electric power plant - Google Patents
Method of producing mixed coal gas by using residual heat of electric power plant Download PDFInfo
- Publication number
- CN1279144C CN1279144C CN 200510017303 CN200510017303A CN1279144C CN 1279144 C CN1279144 C CN 1279144C CN 200510017303 CN200510017303 CN 200510017303 CN 200510017303 A CN200510017303 A CN 200510017303A CN 1279144 C CN1279144 C CN 1279144C
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- heat
- steam
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- electric power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention discloses a method for producing mixed gas by waste heat of an electric power plant, which has the technical scheme that steam discharged by a power generating steam turbine is used for heating normal-temperature air through a cold-hot exchanger; then, the heated air is sent to an inlet of a gas generator through a pipeline; a proper amount of steam is added and enters a gasification layer simultaneously; oxygen in the air at high temperature and carbon have oxidation reaction to generate carbon dioxide and discharge heat; the steam and carbon react to generate carbon monoxide and hydrogen because of the existence of reaction heat; the heat balance in the gas generator is controlled by adjusting the addition quantity of the steam; the temperature of the mixed gas is preserved, and the mixed gas is sent to a boiler of the electric power plant. The present invention has the advantages that the problem of air pollution from small electric power plants is solved, heat discharged by a cooling tower is recovered, heat energy is effectively utilized, the temperature in the boiler of the electric power plant is stable because coal, air and steam are continuously added, and electric generators operate stably and safely.
Description
Technical Field
The invention relates to a method for manufacturing fuel for a small power plant, in particular to a method for manufacturing mixed coal gas by using waste heat of a power plant.
Background
At present, most of small thermal power plants adopt pulverized coal boilers, namely, raw coal is fed into a coal mill, pulverized coal is fed into the pulverized coal boiler through a blower to be combusted, and waste gas is discharged from a chimney. The disadvantages of the coal burning and heat utilization method of the power plant are as follows: (1) the number of unstable factors is large. Due to weather changes, raw coal water content changes and other human factors in the transportation process, the coal powder entering the furnace is easy to be uneven, the fire extinguishing phenomenon is often caused, the system is unstable by light people, and accidents are caused by heavy people; (2) the pollution is serious. As the pulverized coal enters the hearth and is combusted in a boiling state, the pulverized coal is easily taken away by flowing gas, so that serious pollution is caused to the atmosphere, and the environmental quality for human survival is reduced; (3) the energy consumption is high. Because the small thermal power plant adopts medium temperature and medium pressure, the heat utilization rate is low originally, and the energy consumption of electricity per degree is greatly increased due to the serious running, overflowing, dripping and leakage of equipment.
Disclosure of Invention
The invention aims to provide an energy-saving and environment-friendly method for manufacturing mixed coal gas by using waste heat of a power plant.
In order to achieve the purpose, the invention can adopt the following technical scheme:
the method comprises the following steps: firstly, heating normal-temperature air by steam exhausted by a power generation steam turbine through a heat-cold exchanger; then the heated air is sent into the inlet of the gas producer through a pipeline, simultaneously a proper amount of steam is added and enters a gasification layer, and oxygen in the air and carbon are subjected to oxidation reaction at high temperature to generate carbon dioxide and release heat; meanwhile, due to the existence of reaction heat, the water vapor reacts with carbon to generate carbon monoxide and hydrogen; controlling the heat balance in the coal gas producer by adjusting the addition amount of the water vapor; then the mixed coal gas is insulated and sent into a boiler of a power plant for combustion.
The invention has the advantages that the heat of the cooling tower is used for heating air to supplement the heat loss caused by the generation of carbon monoxide in the gas producer, the waste heat is utilized to decompose water vapor under the action of carbon to generate carbon monoxide for hydrogenation, because the waste heat and the carbon both are combustible substances, the combustion of the combustible substances can save a large amount of fire coal, the mixed coal gas is insulated and sent into a boiler of a power plant for combustion, no coal ash is brought out, the air pollution problem of low-heat power is solved, the heat emitted by the cooling tower is recovered, and the heat energy is effectively utilized. Because the coal, the air and the steam are continuously added, the temperature in the boiler of the power plant is very stable, thereby ensuring the stable and safe operation of the generator.
The specific implementation mode is as follows:
the invention relates to a method for producing mixed coal gas by using waste heat of a power plant, which comprises the following steps of firstly heating normal-temperature air by steam exhausted by a power generation steam turbine through a heat-cold exchanger; then the heated air is sent into the inlet of the gas producer through the pipeline, at the same time, a proper amount of steam is added and enters the gasification layer of the gas producer, the oxygen in the air and carbon are oxidized at high temperature to generate carbon dioxide and release heat (C) ) (ii) a At the same time, the water vapor reacts with carbon to produce carbon monoxide and hydrogen due to the presence of the heat of reaction: ( ) (ii) a Controlling the heat balance in the coal gas producer by adjusting the addition amount of the water vapor; then the mixed coal gas is insulated and sent into a boiler of a power plant for combustion.
Claims (1)
1. A method for manufacturing mixed coal gas by using waste heat of a power plant is characterized by comprising the following steps: firstly, heating normal-temperature air by steam exhausted by a power generation steam turbine through a heat-cold exchanger; then the heated air is sent into the inlet of the gas producer through a pipeline, simultaneously a proper amount of steam is added and enters a gasification layer, and oxygen in the air and carbon are subjected to oxidation reaction at high temperature to generate carbon dioxide and release heat; meanwhile, due to the existence of reaction heat, the water vapor reacts with carbon to generate carbon monoxide and hydrogen; controlling the heat balance in the coal gas producer by adjusting the addition amount of the water vapor; then the mixed coal gas is insulated and sent into a boiler of a power plant for combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017303 CN1279144C (en) | 2005-01-07 | 2005-01-07 | Method of producing mixed coal gas by using residual heat of electric power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017303 CN1279144C (en) | 2005-01-07 | 2005-01-07 | Method of producing mixed coal gas by using residual heat of electric power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1654604A CN1654604A (en) | 2005-08-17 |
| CN1279144C true CN1279144C (en) | 2006-10-11 |
Family
ID=34894218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510017303 Expired - Fee Related CN1279144C (en) | 2005-01-07 | 2005-01-07 | Method of producing mixed coal gas by using residual heat of electric power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1279144C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109908757A (en) * | 2019-04-18 | 2019-06-21 | 国电环境保护研究院有限公司 | A kind of carbon base catalyst regenerating unit and regeneration method |
| CN110498394A (en) * | 2019-05-30 | 2019-11-26 | 赫普能源环境科技有限公司 | A kind of thermal power plant's coke hydrogen generating system and method |
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2005
- 2005-01-07 CN CN 200510017303 patent/CN1279144C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1654604A (en) | 2005-08-17 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061011 Termination date: 20170107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |